美国采购需求：201不锈钢管，301方形不锈钢管，301不锈钢圆管，302方形不锈钢管，302不锈钢管，303方形不锈钢管

I'm looking to purchase some square tubing made from stainless steel, specifically in the dimensions of 2 inches by 2 inches. Please provide me with information regarding availability, pricing, and any bulk order discounts you might offer. Additionally, I would like to know about the lead time for shipping and any additional specifications or options available for the tubing. If you have a catalog or sample materials, I would appreciate it if you could share that as well. Looking forward to your prompt response!